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Track total number of WAL records, FPIs and bytes generated in the cluster.

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Commit 6b466bf5f2 allowed pg_stat_statements to track the number of
WAL records, full page images and bytes that each statement generated.
Similarly this commit allows us to track the cluster-wide WAL statistics
counters.

New columns wal_records, wal_fpi and wal_bytes are added into the
pg_stat_wal view, and reports the total number of WAL records,
full page images and bytes generated in the , respectively.

Author: Masahiro Ikeda
Reviewed-by: Amit Kapila, Movead Li, Kyotaro Horiguchi, Fujii Masao
Discussion: https://postgr.es/m/35ef960128b90bfae3b3fdf60a3a860f@oss.nttdata.com
This commit is contained in:
Fujii Masao
2020-12-02 13:00:15 +09:00
parent 91624c2ff8
commit 01469241b2
7 changed files with 104 additions and 9 deletions
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27
doc/src/sgml/monitoring.sgml
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@ -3447,6 +3447,33 @@ SELECT pid, wait_event_type, wait_event FROM pg_stat_activity WHERE wait_event i
</thead>
<tbody>
<row>
<entry role="catalog_table_entry"><para role="column_definition">
<structfield>wal_records</structfield> <type>bigint</type>
</para>
<para>
Total number of WAL records generated
</para></entry>
</row>
<row>
<entry role="catalog_table_entry"><para role="column_definition">
<structfield>wal_fpi</structfield> <type>bigint</type>
</para>
<para>
Total number of WAL full page images generated
</para></entry>
</row>
<row>
<entry role="catalog_table_entry"><para role="column_definition">
<structfield>wal_bytes</structfield> <type>numeric</type>
</para>
<para>
Total amount of WAL bytes generated
</para></entry>
</row>
<row>
<entry role="catalog_table_entry"><para role="column_definition">
<structfield>wal_buffers_full</structfield> <type>bigint</type>